Suppression of Superfluid Density and the Pseudogap State in the Cuprates by Impurities

Erdenemunkh, Unurbat; Koopman, Brian; Fu, Ling; Chatterjee, Kamalesh; Wise, W. D.; Gu, G. D.; Hudson, E. W.; Boyer, Michael C.

doi:10.1103/PhysRevLett.117.257003

Title: Suppression of Superfluid Density and the Pseudogap State in the Cuprates by Impurities

Journal Article · Fri Dec 16 00:00:00 EST 2016 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.117.257003· OSTI ID:1348293

Erdenemunkh, Unurbat ^[1]; Koopman, Brian ^[1]; Fu, Ling ^[1]; Chatterjee, Kamalesh ^[2]; Wise, W. D. ^[2]; Gu, G. D. ^[3]; Hudson, E. W. ^[4]; Boyer, Michael C. ^[5]

Clark Univ., Worcester, MA (United States). Dept. of Physics
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Dept. of Physics
Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.
Pennsylvania State Univ., University Park, PA (United States). Dept of Physics; Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Dept of Physics
Clark Univ., Worcester, MA (United States). Dept. of Physics; Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Dept. of Physics

Here, we use scanning tunneling microscopy (STM) to study magnetic Fe impurities intentionally doped into the high-temperature superconductor Bi₂Sr₂CaCu₂O_8+δ. Our spectroscopic measurements reveal that Fe impurities introduce low-lying resonances in the density of states at Ω₁ ≈ 4 meV and Ω₂ ≈ 15 meV , allowing us to determine that, despite having a large magnetic moment, potential scattering of quasiparticles by Fe impurities dominates magnetic scattering. In addition, using high-resolution spatial characterizations of the local density of states near and away from Fe impurities, we detail the spatial extent of impurity-affected regions as well as provide a local view of impurity-induced effects on the superconducting and pseudogap states. Lastly, our studies of Fe impurities, when combined with a reinterpretation of earlier STM work in the context of a two-gap scenario, allow us to present a unified view of the atomic-scale effects of elemental impurities on the pseudogap and superconducting states in hole-doped cuprates; this may help resolve a previously assumed dichotomy between the effects of magnetic and nonmagnetic impurities in these materials.

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Research Organization:: Brookhaven National Lab. (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0012704; DMR-1341286; SC00112704

OSTI ID:: 1348293

Alternate ID(s):: OSTI ID: 1336885

Report Number(s):: BNL-113678-2017-JA; PRLTAO; R&D Project: PO010; KC0201060; TRN: US1701132

Journal Information:: Physical Review Letters, Vol. 117, Issue 25; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 9 works

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